After failing to install the Ubuntu 11.04 Desktop version (burned on a DVD, because ISO's file size was 726 MB), I tried the alternate version (about 686 MB) which I burned on CD.
During the installation process, I manually partitioned the hard drive using ext3. After the installation, the CD ejects itself and I hit "continue". In the k boot prompt I hit "enter" on my the keyboard. I see a welcome message in a dark background (a kind of full screen terminal/console called CLI I think) and was asked to enter my user name and password.
After that, instead of booting into the beautiful desktop of Ubuntu, I saw this:
It was like a line of command I think, where you can use "sudo" commands. It is called a non-graphic mode I think.
My real problem is to enter Ubuntu 11.04 with the chocolate-colored background and the African music drum. I tried many commands to boot into the graphic mode of the system such as Ctr+Alt+F7 but nothing happened. In this case, I just saw numbers showing available blocks. I don't understand.
I also tried
sudo startx without result.
I do bought a PS3 both for gaming and for Ubuntu because I can't afford buying a PC.